Key Takeaways
- EVO ICL adds a small lens inside your eye without removing corneal tissue. It’s also reversible.
- PRK reshapes your cornea’s surface with a laser and works best for mild to moderate prescriptions of myopia and mild hyperopia.
- EVO ICL is a good option if you have thin corneas, dry eyes, or a higher prescription of nearsightedness (myopia), and even in some with farsightedness (hyperopia).
- Both procedures lead to clear vision, though PRK has a longer initial recovery than some other laser options.
- A thorough eye assessment helps determine which option suits your eyes and lifestyle.
Different Kinds of Vision Correction
You’ve decided you’re done with glasses and contacts. Now you’re looking at two options, EVO ICL and PRK, and wondering what actually sets them apart. The short answer is this: EVO ICL tends to suit people with higher prescriptions, thinner corneas, or dry eye concerns, while PRK works well for those with mild to moderate prescriptions and healthy corneas.
Vector Eye Centre offers both procedures, along with thorough assessments to figure out which one fits your situation. If you want a side-by-side look at how these options compare to others, our refractive surgery overview is a good place to start.
What Each Procedure Actually Does
EVO ICL: A Lens Added to Your Eye
EVO ICL involves placing a small, soft lens just in front of your natural lens, inside the eye. No corneal tissue is removed or reshaped. The new lens works alongside your eye rather than changing its structure.
This procedure is reversible. If your prescription shifts significantly down the road, the lens can be removed or exchanged. That flexibility matters to a lot of people.
PRK: Reshaping Your Cornea’s Surface
PRK uses a laser to reshape the cornea (the clear front surface of your eye), so that it focuses light more accurately on your retina (a tissue at the back of your eye). Unlike some other laser procedures, PRK doesn’t involve cutting a corneal flap — instead, the outer layer of the cornea (the epithelium) is gently removed before the laser reshapes the surface underneath, and then the epithelium naturally regrows over the following days. It’s a well-established procedure that works well for mild to moderate prescriptions in people with healthy corneas, and Dr. Bhamra currently offers PRK as our laser vision correction option.
It’s also permanent. Once the corneal tissue is reshaped, that change remains. There’s no reversing it later.
Key Differences Between EVO ICL and PRK
How They Handle Dry Eyes
Your choice may depend on whether you already have dry eyes. EVO ICL does not affect the corneal nerves that play a role in tear production, so it doesn’t contribute to dry eye symptoms. PRK can also be gentler on the corneal nerves than other laser procedures, since no flap is cut — but the cornea is directly altered during treatment, so some temporary dryness during healing is possible.
For anyone already managing dry eyes in Calgary’s dry climate, this difference can be important. If you’re unsure whether your dry eye could affect your candidacy for surgery, this breakdown of dry eye and vision correction options explains the connection clearly.
Prescription Range and Corneal Health
EVO ICL covers a wide prescription range, from +3 to -20 diopters of nearsightedness. That makes it a practical option for people with stronger prescriptions who may not be good candidates for PRK. It also works for those with thinner corneas, where higher-level laser correction isn’t always appropriate because there isn’t enough tissue to safely reshape.
PRK is suitable for people with healthy corneas that have enough thickness to work with. If your corneas are on the thinner side, PRK may still be possible in some cases where other laser options aren’t — though EVO ICL is often the better fit for significantly thin corneas.
Who Is a Good Candidate for Each Option
EVO ICL May Be Right for You If…
- Your prescription falls in the moderate to high range
- You have thin corneas or deal with chronic dry eyes
- You want a long-term solution that can be adjusted if your eyes change
PRK May Be Right for You If…
- Your prescription is mild to moderate
- Your corneas are healthy, even if on the thinner side
- You don’t mind a slightly longer initial recovery in exchange for a flap-free procedure
Our PRK candidacy guide goes into more detail on what makes someone a suitable fit, including the factors that can rule it out.
What to Expect: Recovery and Results
The EVO ICL Experience
The procedure usually takes less than 12 minutes per eye at Vector Eye Centre. Many people notice clearer vision within 24 hours. A follow-up visit is scheduled the next day so your care team can check how things are settling.
Recovery tends to be smooth, and most people get back to their regular routines quickly. For a fuller picture of what the days and weeks after surgery look like, our ICL recovery guide covers the post-op timeline in detail.
The PRK Experience
PRK recovery takes a bit longer than some other laser procedures, since the eye’s surface layer needs time to heal. Vision is often blurry for the first few days, and a protective contact lens is typically worn immediately after surgery to support healing. Most people notice steady improvement before vision fully stabilizes over the following weeks.
How to Choose the Right Option for Your Eyes
Your prescription, corneal thickness, dry eye history, and lifestyle all factor into which procedure makes sense for you. There’s no shortcut to getting it right. An ophthalmologist in Calgary can walk you through both procedures and help you weigh the trade-offs.
At Vector Eye Centre, our team wants you to be informed before you make any decisions. If you’re ready to explore eye surgery in Calgary and want to understand which option suits your eyes, reach out to us to book your assessment.
